2856091649 has 2 divisors, whose sum is σ = 2856091650. Its totient is φ = 2856091648.

The previous prime is 2856091607. The next prime is 2856091663. The reversal of 2856091649 is 9461906582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2854978624 + 1113025 = 53432^2 + 1055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2856091649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2856091597 and 2856091606.

It is not a weakly prime, because it can be changed into another prime (2856091699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1428045824 + 1428045825.

It is an arithmetic number, because the mean of its divisors is an integer number (1428045825).

Almost surely, 2^2856091649 is an apocalyptic number.

It is an amenable number.

2856091649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2856091649 is an equidigital number, since it uses as much as digits as its factorization.

2856091649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 2856091649 is about 53442.4143260762. The cubic root of 2856091649 is about 1418.8093651497.

The spelling of 2856091649 in words is "two billion, eight hundred fifty-six million, ninety-one thousand, six hundred forty-nine".